The cast for Captain America: Civil War just keeps expanding, with Marvel Studios recently announcing that production is set to begin with a roster of at least a dozen known heroes from the comics (not to mention several villains and supporting cast). While the film sounds as if it won't be following the classic Civil War storyline from the comics per se, we're still fully expecting Iron Man (Robert Downey Jr.) and Captain America (Chris Evans) to be on opposing sides in whatever battle over superhero regulation that is to come. So the big question remains: Who will be on whose side? Here are our best guesses.

Black Widow

Natasha is the only original team member, along with Captain America, to stay an Avenger at the end of Age of Ultron, and we don't think that's a coincidence. She was closely intertwined with Steve Rogers in Captain America: The Winter Soldier, and her loyalty to him appears to run pretty deep. We don't see that changing when the Superhero Registration Act rolls around in May of next year. Verdict: Team Cap

Scarlet Witch

Even by the end of Age of Ultron, Scarlet Witch was no fan of Tony Stark. While she no longer thinks that Stark is evil, she definitely still believes his actions to be misguided. If you've seen the latest Avengers movie, you'll understand why we can't imagine Wanda Maximoff ever siding with Tony Stark. Verdict: Team Cap

War Machine

Jim Rhodes has known Tony Stark longer than anyone, and while they've certainly butted heads in the past, they do seem to share the same overall philosophy. At the end of the day, Rhodes is a soldier and doesn't seem like the type to rebel against his government in any way. Verdict: Team Iron Man

Falcon

Sam Wilson's loyalties lie with Captain America, and he's already proven that he has no issues rebelling against authority. We expect the Falcon to continue in his quest to become Cap's new partner, filling the void left long ago by Bucky Barnes, a man who Wilson is more than likely to bring into the Civil War fray. Verdict: Team Cap

Vision

The last member of the new Avengers team is also one of the trickiest members to figure out. On the one hand, he does seem to have some level of human emotion, which could lead him to align with Cap. On the other hand, he's part machine, so logically he may find Iron Man's push for more regulation to be more in line with the greater good. We're going to go with the latter opinion, but just barely. Verdict: Team Iron Man

Hawkeye

Clint has a wife and kids to look after now, so he may very well be in favor for more stringent safekeeping standards. Age of Ultron put a lot of effort into establishing that he and Natasha are not only friends, and that may well be to build the foundations for a storyline which will see Barton making the tough decision to put family first, and join Stark in supporting the registration act.Verdict: Team Iron Man

Winter Soldier

Bucky seemed to resign from his villainous ways by the end of Winter Soldier, so when he reemerges for Civil War he may be looking to bury the hatchet with his old pal Captain America. With Bucky free from the brainwashing that caused so much heartbreak in the last Captain America movie, we're expecting to see these two wartime pals finally fighting on the same team again. Verdict: Team Cap

Ant-Man

We've yet to see Ant-Man on screen yet, but here's what we do know from the trailers: He's a former prisoner looking to lead a reformed lifestyle as a hero. Doesn't really sound like the type to go against the law, does it? Verdict: Team Iron Man

Black Panther

T'Challa is a character about whom we know even less than we do Ant-Man, making us think that he will only have a bit part to play in the film. But since the film's synopsis mentions an "international incident" that leads to calls for more superhero regulation, and Black Panther just happens to be the leader of a foreign country, perhaps it makes sense for him to be on the side making those calls. Verdict: Team Iron Man

Thaddeus "Thunderbolt" Ross

General Ross hasn't been seen since 2008's The Incredible Hulk, so his inclusion in the film is a bit of a head-scratcher. He's included in this list thanks to the very slim possibility that the film transforms him into his alter-ego from the comics, Red Hulk. While we're not expecting that to take place, we are expecting Ross to be leading the charge against superheroes running around unchecked. Verdict: Team Iron Man.

Wildcard: Spider-Man

While it hasn't yet been confirmed, it's widely rumored that Spider-Man's first appearance in the Marvel Cinematic Universe will be in this film. And why not? Peter Parker plays a pivotal role in the Civil War storyline from the comics, initially siding with Iron Man before switching over to Captain America's side. Might the movie use him in a similar fashion? We'll have to wait another year to find out!